- IP68 waterproof receiver for long-term underwater use; IP54 splash-resistant transmitter withstands poolside splashes and accidental drops into the water
- 9 available channels support up to 9 groups operating in the same area
- Simple and intuitive controls for quick and easy operation
- Lightweight 39 g bone-conduction receiver for a secure and comfortable fit
- Built-in and lavalier microphone options, with support for simultaneous audio and microphone input
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Description
Clear Communication for Real Water Training
The TT120 underwater communication system is built for swim schools, water sports clubs, surf, kayaking, and sailing programs, water safety training, and coaching teams that need clear, reliable communication in and around the water. It helps address common training challenges such as background noise, limited communication once students are in the water, unclear instruction at a distance, and interference when multiple coaches are teaching at the same time.
Designed for real water training environments, the TT120 combines waterproof performance, stable communication, and easy operation to support clearer, more efficient instruction. Additional receivers can be added as needed.
9 Channels
The system supports up to 9 groups operating in the same area at the same time. Each group can use a separate channel to reduce interference and keep communication clear.
Comfortable and Durable Headset Receiver
The receiver uses bone conduction technology, allowing users to hear transmitted audio without placing earbuds inside the ear. This design helps swimmers and trainees hear coaching instructions while staying aware of surrounding sounds. Audio remains clear whether the receiver is above or below the waterline.
Wide Communication Range
The system provides a transmission range of up to 120 meters (394 ft) above the water surface and up to 50 meters (164 ft) in shallow underwater environments at depths of 1.5 to 2 meters (5 to 6.6 ft).
Built-in Rechargeable Battery
The transmitter charges in about 5 hours and provides up to 10 hours of operation. The receiver charges in about 3 hours and provides up to 5 hours of operation.
Flexible Wearing Options
The transmitter offers two wearing options: clip it to a belt or pocket, or wear it around the neck with the included lanyard. The receiver features an ergonomic headset design for a secure and comfortable fit.
More Practical Features
One-Touch Mute
Press the power button briefly to mute audio transmission. This is useful when the instructor needs a private conversation or wants to pause communication for a moment. Press the button again to resume voice transmission.
Magnetic Charging
Both the transmitter and receiver use magnetic charging for quick, accurate alignment with the charging port. This makes charging easier and helps reduce wear caused by frequent plugging and unplugging.
User-Friendly Waterproof Communication System
- Large buttons make operation easier, even in active training environments.
- Adjustable receiver volume helps users hear instructions more clearly.
- The transmitter supports external audio input for playing pre-recorded instruction or background audio through the receivers.
Multiple Uses for Underwater Wireless Communication
Real Training Case Studies
See how the TT120 supports clear communication in real swimming environments, from poolside teaching to professional team training.
Poolside Teaching
Used during swimming instruction to help coaches communicate clearly with learners in and around the pool.
Korean Swimming Team
Used in professional swim training to support clear instruction and real-time coaching during practice.
Package Includes
Choose the package size that best fits your coaching team, swim class, or training group.
| Package | Included Items |
|---|---|
| 1TX+10RX | 1x transmitter, 10x receiver, 1x lavalier microphone, 1x headworn microphone, 1x detachable back clip, 10x earplug, 11x USB charging cable, 1x lanyard, 1x user manual |
| 1TX+15RX | 1x transmitter, 15x receiver, 1x lavalier microphone, 1x headworn microphone, 1x detachable back clip, 15x earplug, 16x USB charging cable, 1x lanyard, 1x user manual |
| 1TX+20RX | 1x transmitter, 20x receiver, 1x lavalier microphone, 1x headworn microphone, 1x detachable back clip, 20x earplug, 21x USB charging cable, 1x lanyard, 1x user manual |
Why Choose RETEKESS
Trusted by 1.68+ million water sports users, with a 30-day return guarantee and 3-year warranty for confident purchasing.
Clear Communication for Real Water Training
The TT120 underwater communication system is built for swim schools, water sports clubs, surf, kayaking, and sailing programs, water safety training, and coaching teams that need clear, reliable communication in and around the water. It helps address common training challenges such as background noise, limited communication once students are in the water, unclear instruction at a distance, and interference when multiple coaches are teaching at the same time.
Designed for real water training environments, the TT120 combines waterproof performance, stable communication, and easy operation to support clearer, more efficient instruction. Additional receivers can be added as needed.
9 Channels
The system supports up to 9 groups operating in the same area at the same time. Each group can use a separate channel to reduce interference and keep communication clear.
Comfortable and Durable Headset Receiver
The receiver uses bone conduction technology, allowing users to hear transmitted audio without placing earbuds inside the ear. This design helps swimmers and trainees hear coaching instructions while staying aware of surrounding sounds. Audio remains clear whether the receiver is above or below the waterline.
Wide Communication Range
The system provides a transmission range of up to 120 meters (394 ft) above the water surface and up to 50 meters (164 ft) in shallow underwater environments at depths of 1.5 to 2 meters (5 to 6.6 ft).
Built-in Rechargeable Battery
The transmitter charges in about 5 hours and provides up to 10 hours of operation. The receiver charges in about 3 hours and provides up to 5 hours of operation.
Flexible Wearing Options
The transmitter offers two wearing options: clip it to a belt or pocket, or wear it around the neck with the included lanyard. The receiver features an ergonomic headset design for a secure and comfortable fit.
More Practical Features
One-Touch Mute
Press the power button briefly to mute audio transmission. This is useful when the instructor needs a private conversation or wants to pause communication for a moment. Press the button again to resume voice transmission.
Magnetic Charging
Both the transmitter and receiver use magnetic charging for quick, accurate alignment with the charging port. This makes charging easier and helps reduce wear caused by frequent plugging and unplugging.
User-Friendly Waterproof Communication System
- Large buttons make operation easier, even in active training environments.
- Adjustable receiver volume helps users hear instructions more clearly.
- The transmitter supports external audio input for playing pre-recorded instruction or background audio through the receivers.
Multiple Uses for Underwater Wireless Communication
Real Training Case Studies
See how the TT120 supports clear communication in real swimming environments, from poolside teaching to professional team training.
Poolside Teaching
Used during swimming instruction to help coaches communicate clearly with learners in and around the pool.
Korean Swimming Team
Used in professional swim training to support clear instruction and real-time coaching during practice.
Package Includes
Choose the package size that best fits your coaching team, swim class, or training group.
| Package | Included Items |
|---|---|
| 1TX+10RX | 1x transmitter, 10x receiver, 1x lavalier microphone, 1x headworn microphone, 1x detachable back clip, 10x earplug, 11x USB charging cable, 1x lanyard, 1x user manual |
| 1TX+15RX | 1x transmitter, 15x receiver, 1x lavalier microphone, 1x headworn microphone, 1x detachable back clip, 15x earplug, 16x USB charging cable, 1x lanyard, 1x user manual |
| 1TX+20RX | 1x transmitter, 20x receiver, 1x lavalier microphone, 1x headworn microphone, 1x detachable back clip, 20x earplug, 21x USB charging cable, 1x lanyard, 1x user manual |
Why Choose RETEKESS
Trusted by 1.68+ million water sports users, with a 30-day return guarantee and 3-year warranty for confident purchasing.
Spec
|
Transmitter |
|
|
Size |
260*50*23mm |
|
Weight |
158g |
|
Battery |
Li-ion Battery, Model: 123658, 3500mAh |
|
Nominal Battery Voltage |
3.7V |
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Transmit Power |
50 nW max |
|
Signal-to-Noise Ratio |
63dB Stereo SNR |
|
Frequency |
97-101MHz |
|
Frequency Response Range |
40Hz-15KHz |
|
Number of Channels |
9CH |
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Channel Spacing |
200KHz |
|
Distortion |
0.1% THD@STEREO, ∆f = 67.5 kHz |
|
Operating Time |
Approximately 10h |
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Transmission Distance |
120m in the open water environment；50m in an underwater environment at depths of 1.5m to 2m； |
|
Charging Time |
Approximately 5h |
|
Waterproof Rating |
IP54 |
|
Receiver |
|
|
Size |
130*95*50mm |
|
Weight |
39g |
|
Frequency |
97-101MHz |
|
Battery |
Li-ion Battery, Model: 521333, 270mAh |
|
Nominal Battery Voltage |
3.7v |
|
Operating Time |
Approximately 5h |
|
Charging Time |
Approximately 3h |
|
Waterproof Rating |
IP68 |
FAQ
Product Review
The coach can send the messages to the team members clearly inside the water, and they can focus on training. The simple and strong functionality of the transmitter, transmission range inside the water and the durability satisfies the team coaches. Especially the voice is crystal clear even inside the water.
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